In factorio.com's privacy policy, it's said that :
But your website uses google analytics*, which is a third party, and not knwon for it's privacy measures...Third party disclosure
We don't provide any of user information (including the email) to third parties.
We will never do this unless we are ordered to do so by law.
Can you remove the script, or update the privacy policy?
Thanks for reading this.
* It also uses a script from ajax.google.com, another way to give data to 3rd parties.